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English definition of “forties”

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forties

plural noun ( also 40s, 40’s)  /ˈfɔr·t̬iz/ us  
the numbers 40 through 49: The temperature will be in the forties (= between 40° and 49°) today. Our house was built in the forties (= between 1940 and 1949). They are both in their forties (= between 40 and 49 years old).
Translations of “forties”
in Chinese (Traditional) 四十多歲(指40到49歲的時期)…
in Chinese (Simplified) 四十多岁(指40到49岁的时期)…
(Definition of forties from the Cambridge Academic Content Dictionary © Cambridge University Press)
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